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Hydrolytic Degradation of Biobased Poly(butylene succinate-co-furandicarboxylate) and Poly(butylene adipate-co-furandicarboxylate) Copolyesters under Mild Conditions
Hydrolytic Degradation of Biobased Poly(butylene succinate-co-furandicarboxylate) and Poly(butylene adipate-co-furandicarboxylate) Copolyesters under Mild Conditions
It is indispensable to investigate hydrolytic degradation behavior to develop novel (bio)degradable polyesters. Biobasedand biodegradable copolyesters poly(butylene adipate-co-butylene furandicarboxylate) (PBAF) and poly(butylene succinate-co-butylenefurandicarboxylate) (PBSF) with BF molar fraction (/BF) between 40 and 60% were synthesized in this study. The hydrolytic degradationof film samples was conducted in a pH 7.0 PBS buffer solution at 25 8C. Slight mass loss (1–2%) but significant decrease inintrinsic viscosity (35–44%) was observed after 22 weeks. The apparent hydrolytic degradation rate decreased with increasing /BF andinitial crystallinity. Meanwhile, PBAFs degraded slightly faster than PBSFs with the same composition. The /BF and crystallinityincreased slowly with degradation time, suggesting the aliphatic moiety and the amorphous region are more susceptible to hydrolysis.And high enough tensile properties were retained after hydrolysis degradation, indicating PBAF and PBSF copolyesters are hydrolyticallydegradable, with tunable hydrolytic degradation rate and good balance between hydrolytic degradability and durability
